Abstract: In one embodiment, a signal light state detection system includes one or more processors, an a non-transitory memory module storing computer-readable instructions. The computer-readable instructions are configured to cause the one or more processors to receive a first image of a vehicle and receiving a second image of the vehicle, wherein the second image is later in time from the first image, and generate a warped image from the first image and the second image, wherein the warped image has individual pixels of one of the first image and the second image that are shifted to locations of corresponding pixels of the other of the first image and the second image. The one or more processors further generate a difference image from the warped image and one of the first image and the second image, and determine, using a classifier module, a probability of a state of vehicle signal lights.

Abstract: Methods, systems, and computer readable media for a phase array directed speaker are disclosed. One system includes a phase array and a controller. The controller is configured to determine an area to send directed sound. The controller is also configured to generate input instructions for the phase array to send directed sound to the area. The input instructions indicate that at least one speaker in the phase array is to delay outputting an audio signal relative to at least one other speaker in the phase array. The phase array is configured to generate, using the input instructions and ultrasonic signals emitted by the speakers in the phase array, the directed sound.

Abstract: Methods, systems, and computer readable media for a phase array directed speaker are disclosed. One system includes a phase array and a controller. The controller is configured to determine an area to send directed sound. The controller is also configured to generate input instructions for the phase array to send directed sound to the area. The input instructions indicate that at least one speaker in the phase array is to delay outputting an audio signal relative to at least one other speaker in the phase array. The phase array is configured to generate, using the input instructions and ultrasonic signals emitted by the speakers in the phase array, the directed sound.